A studding sail or studsail is a sail used to increase the sail area of a square rigged vessel in light winds.
It is an extra sail hoisted alongside a square-rigged sail on an extension of its yardarm. It is named by prefixing the word studding to the name of the working sail alongside which it is set.
Studding sails have also been used to increase the sail area of a fore-and-aft spanker, again by extending the upper spar.
Studsails may be carried on either side of any or all of the square riggedsails.
Each mast has three parts, the lower mast, top mast and top gallant mast (three yards in which to hang sails.) The bowsprit is the spar jutting from the front of this ship in which sails and is also used to support the mast with stays, or support lines.
Outboard of the square sails might be set studdingsails [studding sail, studsail, stun's'l) -- a sail on a special spar, extended outboard of a square sail or sails, for added sail area in moderate winds.
Reeve the end out through the sheave-hole in the gangway, through the tack-block at the swinging boom-end, and bend it to the clew of the sail with a sheet-bend, or a running-eye and cross toggle, the long and short sheets are formed out of one piece of rope.
Take the end up abaft the foreyard, and reeve it through a block under the top, or secured to the foremast-shroud of fore-rigging, through a block on the inner yard-arm of the lower studsail-yard, through a thimble in the after-part of the sail, and bend it to the tack with a sheet-bend.
The hauling part is rove through the inner sheave of double block, secured by a tail to the foremost shroud of the main rigging, the boom-brace being rove through the outer sheave of the same block, or through two sheaves in the ship's side, just before the gangway.